| Name | Version | Description |
|---|---|---|
| haskell-uglymemo | A simple (but internally ugly) memoization function | |
| haskell-unagi-chan | Fast concurrent queues with a Chan-like API, and more | |
| haskell-unagi-streams | Unagi Chan IO-Streams | |
| haskell-unbounded-delays | Unbounded thread delays and timeouts | |
| haskell-unexceptionalio | IO without any non-error, synchronous exceptions | |
| haskell-unexceptionalio-trans | A wrapper around UnexceptionalIO using monad transformers | |
| haskell-unicode-collation | Haskell implementation of the Unicode Collation Algorithm | |
| haskell-unicode-data | Access Unicode Character Database (UCD) | |
| haskell-unicode-show | Print and show in unicode | |
| haskell-unicode-transforms | Unicode transforms (normalization NFC/NFD/NFKC/NFKD) | |
| haskell-uniplate | Help writing simple, concise and fast generic operations. | |
| haskell-universe-base | A class for finite and recursively enumerable types. | |
| haskell-universe-reverse-instances | Instances of standard classes that are made possible by enumerations | |
| haskell-unix-compat | Portable POSIX-compatibility layer. | |
| haskell-unix-time | Unix time parser/formatter and utilities | |
| haskell-unixutils | A crude interface between Haskell and Unix-like operating systems | |
| haskell-unliftio | The MonadUnliftIO typeclass for unlifting monads to IO (batteries included) | |
| haskell-unliftio-core | The MonadUnliftIO typeclass for unlifting monads to IO | |
| haskell-unordered-containers | Efficient hashing-based container types | |
| haskell-unsafe | Unified interface to unsafe functions | |
| haskell-uri-bytestring | Haskell URI parsing as ByteStrings | |
| haskell-uri-bytestring-aeson | Aeson instances for URI Bytestring | |
| haskell-uri-encode | Unicode aware uri-encoding | |
| haskell-url | A library for working with URLs | |
| haskell-utf8-string | Support for reading and writing UTF8 Strings | |
| haskell-utility-ht | Various small helper functions for Lists, Maybes, Tuples, Functions | |
| haskell-uuid | For creating, comparing, parsing and printing Universally Unique Identifiers | |
| haskell-uuid-types | Type definitions for Universally Unique Identifiers | |
| haskell-validation-selective | Lighweight pure data validation based on Applicative and Selective functors. | |
| haskell-validity | Validity typeclass | |
| haskell-validity-bytestring | Validity instances for bytestring | |
| haskell-vault | A persistent store for values of arbitrary types | |
| haskell-vec | Vec: length-indexed (sized) list | |
| haskell-vector | Efficient Arrays | |
| haskell-vector-algorithms | Efficient algorithms for vector arrays | |
| haskell-vector-binary-instances | Instances of Data.Binary for vector | |
| haskell-vector-builder | Vector builder | |
| haskell-vector-hashtables | Efficient vector-based mutable hashtables implementation. | |
| haskell-vector-instances | Orphan Instances for 'Data.Vector' | |
| haskell-vector-sized | Size tagged vectors | |
| haskell-vector-space | Vector & affine spaces, linear maps, and derivatives | |
| haskell-vector-stream | Efficient Streams | |
| haskell-vector-th-unbox | Deriver for Data.Vector.Unboxed using Template Haskell | |
| haskell-versions | Types and parsers for software version numbers | |
| haskell-void | A Haskell 98 logically uninhabited data type | |
| haskell-vty | A simple terminal UI library | |
| haskell-vty-crossplatform | Cross-platform support for Vty | |
| haskell-vty-unix | Unix backend for Vty | |
| haskell-vty5 | A simple terminal UI library (Legacy 5.x version) | |
| haskell-wai | Web Application Interface. |
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